And edwin p



(No Model.)

J. A. OSGOOD & E. P. MONROE.

Stuffing Box.

No. 234,326. Patented Nov 9, 1880'.

Wflin esSes NPETERS, PHOTO LTHOGRAPHEP NASWNGTDN D c ilnirnn StatesATENT rricn.

JOSIAH A. OSGOOD, OF GRANTVILLE, MASSACHUSETTS, AND EDWIN P.

MONROE, OF NEW YORK, N. Y.

STUFFING=BOX.

SPECIFICATION forming part of Letters Patent No. 234,326, dated November9, 1880,

Application filed July 16, 1880. (No model.)

To all whom it may concern Be it known that we, JOSIAH A. OSGOOD, ofGrantville, in the county of Norfolk, State of Massachusetts, and EDWINP. MONROE, of New York, in the county and State of New York, citizens ofthe United States, have invented certain new and useful Improvements inStuffing-Boxes for the Rods of Steam and other Engines, of which thefollowing is a specification.

Our invention relates to certain improvements in packing devices for therods of steam and other engines; and it consists of a device forcontaining the spring and follower or other devices used to hold thepacking up to the rod, which device shall be free to follow any lateraldeviations of the rod from its normal plane of motion, and at the sametime serve as a check for the packing-receptacle.

The advantages of such a device embodying our invention are, that itboth affords a chock or non-yielding support to prevent the packing-cupor other receptacle from being retracted by the rod, and at the sametime allows to the devices which support or hold up the packing freedomto move with the rod in any lateral deviation from its normal path. ltsometimes happens that the packing adheres to the packing-cup and therod, in which case the manifest tendency of the cup is to be carried bythe rod. If, however, the cup is met by a rigid or non-elastic chockwhile the packing is cushioned upon a spring or yielding hearing, thisconstruction operates to free the packing from the cup and prevent thelatter from being carried farther, while the packing is likewise enabledto give slightly, and thus free itself from the rod, which then passesclear. Again, it frequently happens that, owing to wear or lost motionor other imperfection in the parts of the machine which operate the rod,the latter is caused to depart or deviate laterally in some directionfrom its normal path or plane of motion. WVhen this occurs it is obviousthat if the packing and the devices which hold it are not at liberty todeviate with the rod the result will be a torsion or wrenching of theparts, which, by causing them to strike against and out the rod, or inother ways, will give rise to serious evil in the operation of theparts. These two defects found in prior devices-namely, the pulling backof the cup and the twisting or wrenching of the packing-supportin gdevices are obviated by the employment of devices in which our inventionis embodied.

The drawings show various forms of construction embodying ourimprovements.

In Figure 1, A is a packing cup or receptacle, of a common form, betweenwhich and the inner surface of the end of the cap or cover I is shown asliding ring or hearing, B, having a plane and a concave surface. Thisring B, although possessing val uable features as a rocking bearing, isnot essential to our improvements, but may be dispensed with, and theend of the packing-cup A itself may be made plane instead, to slideagainst the cap or cover.

0 represents metallic packing of a wellknown form within thepacking-cup.

D is a follower, likewise of well-known form, made a loose fit for theinterior of the sliding chock G, and resting upon the spring F. Thisspring F and follower D are preferably made of such dimensions that theinterior of the spring fits snugly the neck or projection K of thefollower, while the exterior likewise fits snugly the interior of thechock G. This chock G is a rigid hollow sliding chock between thepacking-cup A and the steam-chest or cylinder-head P, or an extensionthereof, and free to slide or move and follow the lateral deviations ofthe rod H. This sliding chock is shown as abutting loosely against thecup A, and this we consider, for various reasons of convenience ofaccess to the parts, a preferable form; but it may be screwed to the cupA, or even may be formed integral therewith as a prolongation orextension of the wall of the cup.

Either of the three constructions will, it is obvious, preserve theessential features of a rigid sliding chock; but in any construction itwill be found desirable that care should be taken in securing thedevices to their place between the cap or cover I and the steam-chestwall or cylinder-head P to make a loose fit, not setting theparts toorigidly together. The chock G should be sufficiently smaller in exteriordimensions than the cap or cover I to move freely in it, and ofsuflicient size on the inside to contain the spring F, follower D, androd H. The depth of the chock Gr should be sufficiently great to giveroom for the spring F and follower D; but it may be constructed, asshown in Fig. 2, of a greater depth, the excess of space beyond thefollower D being utilized as a chamber or magazine, from which thepacking .1 may be fed forward round the rod to supply fresh packing inplace of that gradually worn away by the rod.

Should it be desired to use this form ofchock without the chamber ormagazine it is obvious that this may be done by filling the space notneeded for the spring and follower by a false bushing, as shown in Fig.1, preferably made in pieces to facilitate removal.

If soft or fibrous packing is to be used care should be taken to makethe follower D fit the rod closely, so as to serve as a movable bushingand keep the packing from being drawn through by the rod.

Lastly, the chock Gr may be provided interiorly with a projecting rim orshoulder forming a support or base for the spring, and this feature,though not essential to our invention, as above described, is valuablein thatit serves to prevent the spring being, from any cause, forcedthrough the opening into the steam- I chest or cylinder-head P.

Witnesses:

ALEX. P. BRowNn, J. HENRY TAYLOR.

